2012
DOI: 10.1246/cl.2012.913
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Electrophilic Aromatic Substitution of Arenes with CO2 Mediated by R3SiB(C6F5)4

Abstract: The Friedel–Crafts-type carboxylation of arenes has been achieved by activating CO2 with silylium borates. The reaction exhibits broader substrate applicability than does our previously reported AlX3/R3SiX-mediated carboxylation.

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Cited by 20 publications
(10 citation statements)
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“…Aluminum chloride can electrophilically activate CO 2 , and then electrophilic substitution occurs on the aromatic ring. Hattori and co‐workers have done a great deal of work on the electrophilic carboxylation of aromatic rings with CO 2 . For example, they found that using AlBr 3 and R 3 SiCl together could significantly promote the direct carboxylation of aromatics .…”
Section: Carboxylation Of C(sp2)−h Bonds With Co2mentioning
confidence: 98%
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“…Aluminum chloride can electrophilically activate CO 2 , and then electrophilic substitution occurs on the aromatic ring. Hattori and co‐workers have done a great deal of work on the electrophilic carboxylation of aromatic rings with CO 2 . For example, they found that using AlBr 3 and R 3 SiCl together could significantly promote the direct carboxylation of aromatics .…”
Section: Carboxylation Of C(sp2)−h Bonds With Co2mentioning
confidence: 98%
“…Also, this system solves the disproportionation problem that often occurs in the carboxylation of ethylbenzene and tert ‐butylbenzene . In 2012, the groups of Müller and Hattori independently reported the carboxylation of aromatics with CO 2 mediated by a silyl cation. In 2009, Munshi and Beckman found that prereacting CO 2 with a Lewis acid before adding toluene could promote the carboxylation of toluene .…”
Section: Carboxylation Of C(sp2)−h Bonds With Co2mentioning
confidence: 99%
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“…[6,7] Ersteres war mit 38 kcal mol À1 als stabiler in der Gasphase berechnet wor-den [6a] und wurde in der kondensierten Phase spektroskopisch nachgewiesen. [14,15] Die Reaktion von Silyliumionen und CO war bereits durch quantenchemische und massenspektrometrische Analysen in der Gasphase untersucht worden. [11] Die dazugehçrigen Lewis-Addukte weisen einen energetisch stabileren C-gebundenen Carbonylliganden auf,w eil das s-symmetrische hçchst besetzte Molekülorbital (HOMO) des CO mehr am Kohlenstoffatom lokalisiert ist.…”
unclassified
“…[12] Angesichts der hohen Lewis-Aciditätv on Silyliumionen [R 3 Si] + [WCA] À (WCA = schwach koordinierendes Anion) [13] interessierten wir uns fürd ie Erforschung der elektrophilen Aktivierung von CO durch diese reaktiven Zwischenstufen (Schema 1, unten). [14,15] Die Reaktion von Silyliumionen und CO war bereits durch quantenchemische und massenspektrometrische Analysen in der Gasphase untersucht worden. [16] 13 CO in den Hintergrundinformationen).…”
unclassified